Cement Pump
I assume U are talking about the screw powder pump
Monitor the drive motor power/amps and install an air injection line to the screwe inlet
As the power nears the max, inject air for a short time. This will fluidrise the feed and lower the power.
Try it and see how u go
Cheers
James ■
Re: Pneumatic Conveyor For Cement Mill Output
The suggestion to use an air purge at the screw inlet is a sound one if the material has a tendency to pack.
You don't mention the application, but assuming the pump is in a mill circuit, you may be getting spitzers from the mills which could over-load the screw and raise the amps.
If you have this problem, put an aerated material trap in the feed system to the pump. ■
Overload Problem
Overload problems such as you have described are due to operating the conveying system at a pressure that is very close to the maximum rating of the compressor. Conveying pressure can pulse up and down depending upon several factors such as variations in feed rate, variations in particle size, line layout, and conveying velocity. To prevent shutting down the conveying system due to overload, a common method is to sense the conveying pressure and to stop the feed for a short time if the pressure exceeds a pre-set maximum pressure. Compressor is allowed to run during this "no-feed" condition.
Regards,
Amrit T. Agarwal
Pneumatic Conveying Consulting Services
Email: polypcc@aol.com
Ph and Fax: 304 346 5125 ■
Pneumatic Conveyor for cement mill output
Dear Every body,
We have a peter pump X-300 type with screw conveyor capacity of 140 tons/hr and the air carring the cement is coming via compressor of 79 m3/min . I am facing a an overload tripping from time to time. Piping distance is not a problem in my case.
Does any body have an idea about designing criteria for such a transport like kg/m3 for cetain distannces...etc ■